Drill



Sem. 30, |924. LSMLZSZ W. S. JOHNSON DRILL Filed Feb. 20, 1923 l f g INVEN TOR.

Wlwmwm@ a citizen of the United States,

entre earner carica WILLIAM S. JOHNSON, 0F ELEGTR, TEXAS.

DRILL.

Application le February 20, 1923. Serial No. 620,250.

To all whom t may concern:

Be it known that I, WILLIAM S. JOHNSON, residing at Electra, in thecounty of Wichita and Sttate of Texas, have invented certain new anduseful Improvements in Drills, of which the' following is aspecification.

This invention relates to drills, more particularly to the manner ofconnecting the bit with the collar, chuck or collet of the drill,designed primarily for use in connection with the drilling of oil wells,yet it is to be understood that a drill in accordance with thisinvention can be employed for any purpose wherein it is foundapplicable, and the invention has for its object to provide in a manneras hereinafter set forth, means to so set up a detachable connectionbetween the bit and collar, chuck or collet of the drill whereby theemployment of screw threads for such purpose is dispensed with,.undersuch conditions providing what may be termed a threadless socket bit.

A further object of the invention is to provide in a manner ashereinafter set forth,

a drill including means to provide for quickly connecting anddisconnecting the drill bit to and from the collar, chuck or collet ofthe drill without the providing of the bit with threads for engagementwith the collar, chuck or collet to secure the bit in position.

Further objects of the invention are to provide a drill for the purposeset forth which is simple in its construction and arrangement, strong,durable, eiiicient and convenient in its use, readily assembled andcomparatively inexpensive.

With the foregoing and other objects in view, the invention consists ofthe novel construction, combination and arran ement of parts ashereinafter more speci cally described and illustrated in theaccompanying drawings, wherein is shown an embodiment of the invention,but it is to be understood that changes, variations and modificationscan be resorted to which come within the scope of the claims hereuntoappended.

In the drawings wherein like reference characters denote corresponding Aparts throughout the several views Figure 1 is a sectional elevation,broken away, of a drill in accordance with this invention. y

Figure 2 is a section on line 2 2, Figure 1.

Referring tothe drawings in detail, a drill in accordance with thisinvention includes a. chuck, collet or collar, referred to hereafter asa collar, and further includes a bit element which is detachablyconnected with the collar without the employment of screw threads, and'the collar is adapted to be secured to a casing section or other meansfor rotating the drill.

The collar includes an upper portion 1- and a lower portion 2,thevformer being of materially less thickness than the latter andprovided with internal threads 3. The lower part of the inner face ofthe lower portion 2 of the collar is beveled to form a conoidalshapedsocket 4, and the bottom edge of the lower portion 2 of the collar isformed with an annular groove 5.

The beveled part of the lower portion 2 of the collar, is provided witha plurality of transversely extending openings and the number of theseopenings can be as many as desired, as shown four in number, andarranged equi-distantly apart and which are indicated at 6, and the wallof each of the openings 6 is threaded. The inner face of the beveledpart of the lower portion 2 of the collar is formed with a plurality ofsockets as indicated at 7 and with` which register the inner ends of theopenings 6. There is a socket 7 associated with each of the openings 6.The outer periphery of the beveled part of the lower portion 2 of thecollar is provided with a plurality of pockets 8 and with the innerportion of the wall of each pocket 8 beveled as at 9. The pockets 8register with the openings 6 and the arrangement is such that the numberof pockets correspond with the number of openings.

That part of the lower portion 2 of the collar, above the socket 4,provides a water lshaped tan 15 having its base of less diameter than te diameter of the body portion 13 whereby the latter at its upper end isformed with an annular ledge 16, and

. tinuous annular ments by a suitable tool.

formed integral with the ledge 16, is a vertically disposed annulariiange 17, which extends into the groove 5.

The tang 15, between its transverse center and its upper end, isprovided with a conoove 18 in its periphery and said groove as a flatbottom wall 19 and an upwardly extending and outwardly inclined upperwall 20.

The bit element is provided with an axial bore 13 which. extendsthroughl the -body portion 13 and tang 15 and opens into the waterpassage 10 when the bit element is secured to the collar.

When the bit element is arranged in position to be `connected with thecollar, the groove 18 opposes the sockets 7 and the tang 15 isdetachably connected with the collar, through the medium of a pluralityof transverselyl extending clamping elements each consisting of athreaded shank 21 having its inner end provided with a clamping head 22and its outer end with a grooved beveled head 23.

A clamping element is extended through each of the openings 6 and theshank of such element has threaded engagement with the threaded wall ofthe opening 6. The clamping heads 22 bind against the upper wall 20ofythe groove and that face of each of the heads 2,2, which bindsagainst the wall 20, is beveled as at 24. The heads 23 are adapted to beseated against the beveled wall portio'ns of the pockets 8 and thegrooves in the heads 23 provide means for the convenient adjusting ofthe clamping ele- AS illustrated, he @01m 2 is' provided with l fouropenings 6 .and associated with each opening is a clamping element, butif desired two openings 6 may be employed and a corresponding number ofclamping elements.

The manner of setting up the bit element with respect to the collarprovides for quickly connecting, as well as disconnecting the bitelement to and from the collar and the connection between the bitelement and collar is set up without the employment of threads on thetang or on the collar, under such conditions the device provides whatmay be termed a threadless socket bit.

The body portion 13 is illustrated as provided with an annular flange16, but in lieu thereof independent lugs can be em loyed, two or more,and engage in sockets ibrmed in the lower edge of the collar and whenthe sockets are employed the annular groove 5 is dispensed with.

From the fore oing description .taken in connection with te accompanyingdrawings, a drill is set up whereby the bit element is connected withthe collar without the employment of interengaging threads and al-` tobe understood that changes inthe details of construction can be hadwithout departing from the spirit ofA the invention as' said socket andformed with a peripheral groove having one of the Walls thereofoutwardly inclined, and transversely extending clamping elementsthreadingly engaging with said collar and provided with beveled clampingheads binding against said wall for detachably connecting the bitelement with the collar.

2. A drill comprising a collar having a conoidal-shaped socket at itslower end, a bit element provided with a tang extended into said socketand formed with a peripheral groove having one of the walls thereofoutwardly inclined, and transversely extending clamping elementsthreadingly engagin with said collar and provided with beveled clampingheads bindin against said wall for detachably connectlng the bit elementwith the collar, said collar having its lower edge grooved, and said bitelement provided with a flange extending in said oove.

3. A drill comprising a oo ar having means to provide a conoidal-shapedsocket at its lower end, the wall of said socket provided with aplurality of sockets disposed at right angles'with respect to saidconoidalshaped socket, lsaid collar further havingv its peripheryprovided with pockets in alignment with the sockets formed in the wallsof said conoidal-shaped socket, said collar further provided withtransverse openings leading from said pockets, a bit element with a tangextended into said conoidal-shaped socket and having its peripheryprovided with a continuous groove with one wall thereof outwardlyinclined, and clamping elements includin threaded shanks engaging withthe walls o said openings and having their inner ends provided withclamping heads formed with beveled faces binding against said inclinedwalls thereby connectin said bit element with said collar, said sha sextending through the sockets disposed at right angles with respect tosaid conoidal-shaped socket, and said shanks having their outer endsprovided with heads seating in said pockets.

4. A drill comprising a collar having means to provide a conoidal-shapedsocket at its lower end, the wall of said socket provided with aplurality of sockets disposed at right angles with respect 4to saidconoidal-shaped socket, said collar further having its peripheryprovided with pockets in alignment with the sockets formed in the wallsof said conoidal-shaped socket, said 9011er further provided withtransverse openings leading from said pockets, a bit element with a tangextended into said conoidal-shaped socket and having its peripheryprovided with a continuous groove with one Wall thereof outwardlyinclined, and clamping elements including threaded shanks engaging withthe walls of said openings and having their inner ends provided withclamping heads formed with beveled faces binding against said inclinedWalls thereby connecting said bit element with said collar, said Shanksextending through' the sockets disposed at right angles with respect tosaid colloidal-shaped socket, and said shanks having their outer endsprovided with heads seating in said pockets, said bit element providedWith an axial bore opening into said collar and said collar providedwith means for connecting a bit operating element therewith, said collarhaving its lower edge grooved, and said bit element provided with aflange extending into the grooved end of the collar.

In testimony whereof, I aix my signature hereto.

WILLIAM S. J'HNSON.

